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A murder warrant has been issued for a man suspected of killing former Atascosa County Commissioner Tommy Shearrer.

Atascosa County Sheriff Tommy Williams, Shearrer's uncle, said investigators still don't know what led to the fatal shooting. He said authorities had a few leads on the whereabouts of suspect Manuel De Los Reyes Galeas, but “nothing (had) panned out” by this afternoon.

Galeas, 19, of San Antonio, is believed to have visited his girlfriend's house in the 25000 block of U.S. 281, near the Atascosa-Bexar County line, about 7:45 a.m. Wednesday, Bexar County sheriff's Detective Louis Antu said.

“He tried to make contact with her, she declined, and then he began shooting at her” in her driveway, Antu said. “She went inside the house, and he got in his vehicle and drove south, towards Atascosa County.”

Shearrer's body was discovered about 8:15 a.m. on St. Augustine Road near FM 3006.

His death shocked the tight-knit community, where he also was a prominent businessman and a volunteer.